Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.
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Question 131: What happens when three coplanar non-parallel forces are in equilibrium?
Options:
A) Their lines of action are parallel.
B) They are represented in magnitude only
C) They are represented in direction only
D) Their lines of action meet at a point
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The correct answer is D .
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Question 132:
Caesium has a work function of 3 x 10-19J. the maximum energy of liberated electrons when it is illuminated by light of frequency 6.7 x 1014HZ is?
[h = 6.6 x 1010-34Js]
Options:
A) 1.42 x 10-19J
B) 3.00 x 10-19J
C) 4.42 x 1010-19J
D) 7.42 x 10-19J
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The correct answer is A .
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Question 133: What charge is stored in a 0.1F capacitor when a 10V supply is connected across it?
Options:
A) 1C
B) 5C
C) 4C
D) 2C
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The correct answer is A .
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Question 134: What type of reaction is represented by the following scheme? + + + + energy
Options:
A) Fusion reaction
B) Fission reaction
C) Chain reaction
D) Radioactive decay
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The correct answer is A .
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Question 135: The small droplet of water that forms on the grass in the early hours of the morning is
Options:
A) hail
B) dew
C) fog
D) mist
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The correct answer is B .
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Question 136: When an object is placed between the principal focus and the optical center of a convex lens, it could be used as a?
Options:
A) Simple microscope
B) refecting lens
C) compound microscope
D) projector
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The correct answer is A .
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Question 137: A conductor of length 2m carries a current of 0.8A while kept in a magnetic field of magnetic flux density 0.5T. The maximum force acting on it is
Options:
A) 0.2N
B) 0.8N
C) 3.2N
D) 8.0N
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The correct answer is B .
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Question 138: An object 4 cm high is placed 15 cm from a concave mirror of focal length 5 cm. The size of the image is
Options:
A) 2 cm
B) 3 cm
C) 4 cm
D) 5 cm
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The correct answer is A .
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Question 139:
In the equation above, the particles X is
Options:
A) a proton
B) a neutron
C) an α - particle
D) a β - particle
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The correct answer is A .
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Question 140: Total internal reflection occurs when light moves from
Options:
A) a dense medium to a less dense medium
B) air to water
C) water to glass
D) a less dense to a dense medium
Show Answer
The correct answer is A .